Hasarlı Çene Kemiklerinde Abutment Boyunun Dental İmplant Sistemi Üzerindeki Etkileri.

The purpose of this study is to investigate the stresses occurred on hard and soft bones after recovering the deficiency caused by totally edentulous and damaged mandible by using abutments with different lengths and prosthesis filling material. Two different damaged parts of 2.5 and 4.5 mm in depth were created with the aid of Solidworks program on the right hand side of the mandible. Implants were then applied between the foremen channels. Later, the damaged models were recovered by abutment with different lengths as for the first method. Two models using abutment were, therefore, obtained for the damaged parts of 2.5 and 4.5 mm in depth. In the second method, for the same damaged cases, prosthesis filling material was used to recover deficiency keeping the abutment length constant. Finally, there were totally obtained 4 different damaged models of two fixed with abutment and two fixed with filling material and 1 undamaged model. At the second step of this study, the stress values were obtained on lower jaw bones by using finite element method under the maximum chewing force and compared to each other. The results showed that stress data obtained particularly on the soft and hard bones were distributed more uniformly on the damaged models fixed with prosthesis filling material compared to the damaged models recovered by abutment. Moreover, the stress values obtained for models fixed with different abutment length were rather high in comparison to those of the filling material application. [ABSTRACT FROM AUTHOR]